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Acid leaching method for extracting potassium, aluminum and silicon elements from potassium feldspar

A technology of potassium feldspar and silicon element, applied in the field of decomposition of potassium-containing rocks, can solve the problems of high production cost, cumbersome operation steps, and low recycling rate, achieve high quality and performance, simplify processing technology, and improve ion exchange efficiency effect

Active Publication Date: 2012-11-21
福建省盛龙化工有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and problems of low recycling rate, cumbersome operation steps, high production cost and poor extraction effect in the prior art, and to provide a high recycling rate, simple operation steps, production Acid leaching method for extracting potassium, aluminum and silicon elements from potassium feldspar with lower cost and better extraction effect

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  • Acid leaching method for extracting potassium, aluminum and silicon elements from potassium feldspar

Examples

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Effect test

Embodiment 1

[0036] An acid leaching method for extracting potassium, aluminum and silicon elements from potassium feldspar, the acid leaching method includes the following processes in sequence:

[0037] The first acid leaching process: first add potassium feldspar ore powder with a particle size of 100 mesh to the acid leaching solution, the mass ratio of potassium feldspar ore powder and acid leaching solution is 1:3.5, and then stir under normal pressure for 1– It takes 4 hours for the first acid leaching reaction. During the reaction, slowly add hydrofluoric acid while stirring. The mass ratio of potassium feldspar ore powder to hydrofluoric acid is 1:0.003–0.03, and the reaction temperature is 90°C–120°C. After the reaction, the reaction solution is filtered and separated to obtain the first acid leaching filter residue and the first acid leaching filtrate, and then the first acid leaching filtrate is sequentially cooled and crystallized, filtered and separated to obtain crystallizati...

Embodiment 2

[0044] An acid leaching method for extracting potassium, aluminum and silicon elements from potassium feldspar, the acid leaching method includes the following processes in sequence:

[0045] The first acid leaching process: first add potassium feldspar powder with a particle size of 200 mesh to the acid leaching solution, the mass ratio of potassium feldspar powder and acid leaching solution is 1:2, and the potassium feldspar powder is soaked in sulfuric acid Pretreatment of iron removal process, and then stirring under normal pressure for 1-4 hours to carry out the first acid leaching reaction. During the reaction, sodium fluoride is slowly added while stirring, and the mass ratio of potassium feldspar ore powder to sodium fluoride is 1. : 0.003–0.03, the reaction temperature is 90°C–120°C, after the reaction, the reaction solution is filtered and separated to obtain the first acid leaching filter residue and the first acid leaching filtrate, and then the first acid leaching ...

Embodiment 3

[0052] An acid leaching method for extracting potassium, aluminum and silicon elements from potassium feldspar, the acid leaching method includes the following processes in sequence:

[0053] The first acid leaching process: first add potassium feldspar powder with a particle size of 300 mesh to the acid leaching solution, the mass ratio of potassium feldspar powder and acid leaching solution is 1:3, and the potassium feldspar powder is magnetically separated Pretreatment of iron removal process, and then stirring under normal pressure for 1-4 hours to carry out the first acid leaching reaction. During the reaction, potassium fluoride is slowly added while stirring, and the mass ratio of potassium feldspar ore powder to potassium fluoride is 1 : 0.003–0.03, the reaction temperature is 90°C–120°C, after the reaction, the reaction solution is filtered and separated to obtain the first acid leaching filter residue and the first acid leaching filtrate, and then the first acid leach...

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Abstract

The invention relates to an acid leaching method for extracting potassium, aluminum and silicon elements from potassium feldspar, which comprises the following steps of: performing acid leaching reaction on potassium feldspar powder, and filtering to obtain acid leaching filter residues for the first time and acid leaching filter liquor; performing the acid leaching reaction on the acid leaching filter residues for the first time, and filtering to obtain acid leaching filter residues for the second time and acid leaching filter liquor; performing the acid leaching reaction for the acid leaching filter residues for the second time, and filtering to obtain acid leaching filter residues for the third time and acid leaching filter liquor; washing and drying the acid leaching filter residues for the third time to obtain silicon dioxide; and crystallizing and separating all acid leaching filter liquors, extracting potassium and aluminum elements in a crystalline mode, and recovering residual acid liquor to enter the next round for circular acid leaching. In the acid leaching method, the ion exchange rate is improved by performing duplex type alternate and circular acid leaching and filtering and separating the filter liquors and the filter residues gradually, so that the extraction rate of the potassium and aluminum elements and the purity of the silicon dioxide are more than 99 percent. Therefore, the acid leaching method is high in an extraction effect, simple and easy in operating steps, high in a recycling rate and low in production cost.

Description

technical field [0001] The invention relates to a method for decomposing potassium-containing rocks, in particular to an acid leaching method for extracting potassium, aluminum and silicon elements from potassium feldspar, and is particularly suitable for improving the extraction rate of potassium, aluminum and silicon elements in potassium feldspar . Background technique [0002] At present, the soil potassium deficiency in our country is serious, and the demand for potassium fertilizer is very large. However, the water-soluble potassium salt mineral resources in my country are very small, which is far from meeting the demand. However, my country has very rich water-insoluble potassium salt mineral resources, such as potassium feldspar , so how to comprehensively develop and utilize potassium feldspar resources is of great significance. [0003] The Chinese patent authorization announcement number is CN101559959B, and the invention patent issued on December 1, 2010 disclose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B26/10C22B21/00C01B33/021
CPCY02P10/20
Inventor 袁灿张卫军刘花子高中洪
Owner 福建省盛龙化工有限公司
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